Full Stack Engineer

$180K – $300K · Offers Equity · The compensation may vary further depending on individualized factors for candidates, such as job-related knowledge, skills, experience, location, and other objective business considerations.

Benefits: Comprehensive medical, dental, vision coverage; 401(k); fertility and parental benefits; generous PTO; daily meals, wellness & commuter benefits at our NYC HQ; learning and development stipend. Benefits vary by country and employment type.

MGI's platform enables human feedback within our research engine. Today, the platform is a desktop app that allows users to browse tasks, record gameplay, and get paid, backed by services that manage sessions, verify uploads, and process payouts. Next, the platform will power ever more diverse tasks such as watching and correcting the model, collecting data of humans operating in simulation, and real-world teleoperation tasking.

We're spinning it up now and need someone to own it end-to-end. You'll lead the engineering and think like an owner about where the platform goes - we need extremely high ownership and ruthless optimization for speed.

What We're Looking For

• You integrate with our C#/.NET game recorder over WebSocket JSON-RPC - screen capture, game detection, input capture, video encoding - and debug across the Electron↔recorder boundary when things break; you're at home with the Electron main↔renderer split and IPC (deep Node.js is enough if Electron is new).
• You build anti-cheat and fraud detection - server-side validation that catches faked gameplay, AFK farming, input spoofing, and manipulated recordings. Workers are paid to beat you; your job is to make it impossible.
• You own the money path in Java / Spring Boot against Postgres - earnings, payouts, and status tracking (Tipalti) on an immutable, auditable ledger where correctness is non-negotiable (migrations, query optimization, transaction isolation).
• You build the admin tools in Next.js for managing users, reviewing sessions, and processing payments - productive day one in TypeScript + React (Zustand, Vite).
• You harden the full stack - mTLS between Cloudflare and origin, OIDC-authenticated Pub/Sub webhooks, encrypted-at-rest auth tokens (Electron safeStorage/DPAPI), a pillar-encrypted secrets pipeline, and signed installers - on GCP (Cloud Run, Cloud SQL, GCS, Pub/Sub, Secret Manager), reading Terraform and debugging deploys as you go.
• You run the marketplace mechanics - a cohort system for A/B testing task configs (pricing, duration, game selection) to find the price point that maximizes training-data volume and quality per dollar.
• You build the legal + compliance tooling - click-wrap ToS versioning, sanctioned-country geofencing, GDPR DSR fulfillment, and worker-classification guardrails that keep the contractor relationship defensible.

Our Stack

Frontend React/TypeScript (Zustand, Vite), admin in Next.js · Desktop Electron + C#/.NET recorder (WebSocket JSON-RPC) · Backend Java/Spring Boot + Postgres (Flyway) · GCP (Cloud Run, Cloud SQL, GCS, Pub/Sub, Secret Manager), Cloudflare, GitHub Actions, Terraform · Media: ffprobe, CRC32C, NVENC/AMF · Payments: Tipalti

Millions of gamers capture, share, and discover new games on Medal, the largest platform for gaming clips. Our mission is to design products that make sharing and connecting around gaming seamless and fun, and build a place where brands and game publishers can reach high-quality gamers to grow their products.